| 摘要 |
A method and apparatus for replacing existing ballast water in the ballast tanks of a ship while the ship is underway in the sea utilizes a seawater inlet port in the bow of the ship that admits water when the ship is moving to produce a pressure that is greater than the pressure of the ballast water that is to be replaced, with the incoming seawater from the inlet port being directed into the bottom portion of the ballast tanks where it rises to displace the existing ballast water from outlet ports located in a top portion of the ballast tanks.
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